Plasterer&#39;s corner-strip.



P. M. GONGILL. PLASTEBERS CORNER STRIP. APPLICATION FILED NOV.5,1910

1,019,951. Patented Mar. 12,1912.

UNITED ST FRANCIS M. conGrLL, or nnsnonms, IOWA.

rrAs'rERER's CORNER-STRIP.

Specification of Letters Patent.

Patented Mar. 12, 1912.

Application filed November 5 1910. Serial No. 590,903.

To all whom it may concern:

Be it known that I, FRANCIS M. CoNcrLL, a citizen of the United States, residing at Des Moines, in the county of Polk and State of Iowa,.have invented a certain new and useful Plasterers Corner Strip, of which the following is a specification.

One of the great objections to the use of wooden lath and plaster in buildings is that the wet plaster expands the lath and studding to which the lath is attached and then when the plaster and lath and studding dry the plaster separates at the corners and un-.

sightly cracks are thereby formed.

My object is to provide a plasterers corner strip of simple, durable and inexpensive construction that may be placed in the corners on the laths and that will receive the plaster and hold the plaster firmly together at the corners so that the contraction of the laths will not contract plaster at the corners.

More specifically itis my object to provide a plasterers corner strip so arranged that the plaster applied first to .one wall and then to the otherat the corner will be firmly united and held together by the corner strip in such a manner as to reduce the tendency of the plaster to. separate at the corner.

My invent-ion consists in certain details, in the construction, arrangement and combination of the various parts of the device, whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in my claim and illustrated in the accompanying drawings, in which:

Figure 1. shows a perspective view of a portion of a plasterers corner strip embodying my invention, and Fig. 2 shows a detail,

horizontal, sectional view of a portion of a building having my improved corner strip applied thereto as in use.

Referring to the accompanying drawings, I have used the reference numeral 10 to indicate studdi-ng 'for a building andll laths secured to the studding. In applying the laths when my improved strips are to be used, I first place the laths on one side wall, as shown at the left of the sheet, and I then place the corner strip in position and finally apply the laths upon the wall, as shown at the top of the sheet. The advantages of this arrangement will be set forth hereinafter. My improved corner strip comprises a single piece of sheet metal doubled. at its central portion at 12. doubled portion stand slightly spaced apart The sides of this at 13. One of the-sides beyond the doubled portion is applied as indicated at 14 and the other side is extendedat right angles as ,and the edge of the doubledportion 12 is substantially the same as thethickness of an ordinary lath as shown in Fig. 1.

In practical use, I apply my improvement to a building as follows First, thelaths are attached to the studding on one wall in the ordinary manner. I have placed a corner strip in position withthe doubled edge thereof in engagement with a studding on the adjacent wall. In this way the corner strip is made to stand with the part 15 properly spaced apart from the studding of the wall adjacent to the laths that have already been placed in position. After this has been done I place the laths on the said adjacent wall under the part 15 of the strip and I then secure both the strip and the laths by nails 18 extending through the strip and laths into the adjacent studding. Then the plaster is placed on the walls and the corner strips are covered by the plaster. Some of the plaster will enter the space 13 in the doubled portion of the corner strip and the plaster will also pass through the openings 17. between the laths and become keyed to .the corner strip. In this w. y the plaster on one wallwill become thoroughly united with the plaster on the adjacent wall at the corner.

Assuming that the plaster and laths contract after the plaster dries 'it is obvious that the spring metal will permit only a very slight movement of the part 15 relative to the part 14, not enough to permit the plaster to crack, and the contraction of the lath and plaster is therefore equally distributed along both' walls adjacent to the corner in such a manner as to avoid cracki not-unite with the plaster of the opposite wall when it is put together in the manner above describedso that there is a'tendency for the plaster to separate at the corner on 'sirable to provide for a slight amount of elasticity in the corner strips in order to prevent the corner strips from tearing apart from one wall to the other during the expansion or contraction of the studding and lath. By my improved corner strip 'this slight elasticity is provided'tor and yet the parts are so arranged'that there may be sufficient elasticity without danger of cracking the plaster when the parts 14 and 15 spread slightly on account of the expansion or contraction of the studding to which they are attached. a

I claim as my invention:

Aplasterers corner stri formed of a sin le piece of sheet metal folded double at its central portion with the sides of said iolded portion spaced slightly apart from each other to receive laster between them, one end of said strip eing bent at right an les to the other end and to said folded portion, the width of said folded portion being such,

that when the foldedend thereof is placed against awall, an end of a lath can be conveniently received between the bent end of the strip and the wall, the ends ofsald strip being provided with openings to receive fas-- tening devices and with openings to receive plasterfor keying plaster to the strip and to laths.

Des Moines, Iowa, August 16, 1910.

FRANCIS M. GONGILL.

Witnesses:

MARY WALLACE, W. A. LorrUs. 

